(a) Explain what is the difference between a direct current and an alternating current Write one important advantage of using alternating current.
(b) An air conditioner of 2kW is used in an electric circuit having a fuse of 10 A rating. If the potential difference of the supply is 220 V, will the fuse be able to withstand, when the air conditioner is switched on ? justify your answer.
CBSE Class X Science LA (5 Marks)
Answers
Answered by
69
(a) The current whose direction gets reversed after every half cycle is called an alternating current
or AC. There is no change in the direction of DC.
The most important advantage of using AC over DC is that in the AC mode electric power can
be transmitted over long distances with less loss of power.
(b) Here P = 2 kW = 2000 W, V = 220 volt P = VI, the current I = P 2000 = V 220 = 9.09 A As the current is 9.09 A, below the rating of fuse, the fuse will withstand i.e., it will not blow off when AC is on.
(b) Here P = 2 kW = 2000 W, V = 220 volt P = VI, the current I = P 2000 = V 220 = 9.09 A As the current is 9.09 A, below the rating of fuse, the fuse will withstand i.e., it will not blow off when AC is on.
Answered by
2
(a) The current whose direction gets reversed after every half cycle is called an alternating current or AC. There is no change in the direction of DC. The most important advantage of using AC over DC is that in the AC mode electric power can be transmitted over long distances with less loss of power.
(b) Here P = 2kW = 2000W, V = 220 Volt
As the current is 9.09 A, below the rating of fuse, the fuse will withstand i.e., it will not blow off
Similar questions